Nope, had a couple of jobs at uni as an iOS dev. Problem is I don't know how to sell myself as a developer or look for jobs.
That's a great start, but what kind of jobs are we talking about here? I'm asking because you might want to invest into building more experience before breaking off on your own. I'm talking about possibly larger projects, cooperating with other teams, driving products forward, working with PMs/customer requirements and so on. One way to get there is to work at a larger organization. People place value on experience.
The alternative is to get a normal full-time job for a few years, build credibility, then go on your own using the contacts you made at your employer.
That's definitely worth trying. But please remember, that is exactly what in an insurmountable amount of people is currently doing over at UpWork/Fiverr/Freelancer.com. You need some kind of advantage over them - if you want to nail your jobs and get paid a salary that can sustain you.